The Cardano Operations Book

Environment: Preview Testnet

Usage: Testing release candidates and mainnet releases. Leads mainnet hard forks by at least 4 weeks.

Ideally stays long running. Only if an issue is found after it forks that's breaking should it be respun.

Epoch length of 1 day. Development flags allowed in configuration files.

Upgrade Strategy:

• Release Candidates - 1/3 of nodes
• Official Releases - 2/3 of nodes
• Hard forks - all nodes
• Community requested to only deploy release candidates and official releases

Changes Requested by: Release Squad Lead

Approvals Required: SRE Tribe Lead, Cardano Head of Engineering, Cardano Head of Architecture

Responsible: IOG SRE

Accountable: Head of SRE/Release Squad Lead

Consulted: SPOs

Informed: Cardano Core Tribe, COO, Director of Engineering

Configuration files

Compatible with cardano-node release 10.5.1

NOTE:
The non-block-producer node config has `PeerSharing` enabled by
default, so should not be used with block-producers.

Additionally, avoid connecting a block-producer not using p2p to a p2p
PeerSharing enabled relay as the block-producer's IP will be leaked.

• Node Config (Non-block-producers -- see note above)
• Node Config (Block-producers)
• DB Sync Config
• Submit API Config
• Node Topology
• Peer Snapshot
• Byron Genesis
• Shelley Genesis
• Alonzo Genesis
• Conway Genesis
• Compiled guardrails script

Ouroboros Genesis Mode

Ouroboros genesis mode is now the default consensus mode on preview and preprod testnets starting with node 10.5.0. If needed, use of praos mode and the bootstrap peers found in the above topology file can be reverted to by setting:

• Node config's ConsensusMode option to a value of PraosMode

UTXO-HD

Users migrating from a node version older than 10.4.1 should also read the 10.4.1 release notes and the consensus migration guide to properly configure the node and convert the database such that a replay from genesis can be avoided.

Guardrails reference script UTxO

For convenience, the guardrails script has been put on a UTxO so that it can be used as reference script in Treasury Withdrawal and Protocol Parameter Change proposals.

Guardrails script address: addr_test1wrazf7es2yngqh8jzexpv8v99g88xvx0nz83le2cea755eqf68ll6 Guardrails script UTxO: f3f61635034140e6cec495a1c69ce85b22690e65ab9553ef408d524f58183649#0